How many time have you been browsing the web and come across a website that just didn't work right? Maybe the text loaded funny, or maybe you press a button and nothing happens?
Sometimes web designers can program content for specific web browsers (Internet explorer, chrome, firefox, etc.) Luckily, Safari has a great developer feature called "Change User Agent". This allows you to determine if a website is customizing content for different browsers by having Safari identify itself as a different browser.
To access this cool feature you have to enable the devlop menu. To do this, open Safari and go to preferences. Head to the advanced section and check the box at the bottom that says "show develop menu in menu bar." Now the develop menu will be visible in the menu bar where you can choose different user agents!